STOCK OPTION PLAN AND WARRANTS, STOCK OPTIONS (Details) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Number of shares [Roll Forward]
Exercised (in shares)	0	0
Cashless exercise of options shares (in shares)	0ztho_CashlessExerciseOfOptionsShares	0ztho_CashlessExerciseOfOptionsShares
Stock option fair value assumptions [Abstract]
Stock based compensation expense	$ 3,878,139us-gaap_ShareBasedCompensation	$ 251,159us-gaap_ShareBasedCompensation
Unrecognized compensation cost on non-vested share-based compensation		687,168
Stock Options [Member]
Number of shares [Roll Forward]
Outstanding at beginning of period (in shares)	11,033,675	9,583,762	9,583,762
Granted (in shares)	0		2,372,800
Exercised (in shares)	0		0
Expired and Cancelled (in shares)	(1,275,040)		922,887
Outstanding at end of period (in shares)	9,758,635		11,033,675
Exercisable at the end of the period (in shares)	9,758,635		11,033,675
Weighted average exercise price [Roll Forward]
Outstanding at the beginning of period (in dollars per share)	$ 1.05	$ 1.16	$ 1.16
Granted (in dollars per share)	$ 0		$ 0.58
Exercised (in dollars per share)	$ 0		$ 0
Expired and Cancelled (in dollars per share)	$ 1.39		$ 0.99
Outstanding at end of period (in dollars per share)	$ 1.02		$ 1.05
Exercisable at end of the period (in dollars per share)	$ 1.02		$ 1.05
Stock option fair value assumptions [Abstract]
Granted (in shares)	0		2,372,800
Options exercise price (in dollars per share)	$ 0		$ 0.58
Stock Options [Member] \| Employees [Member]
Number of shares [Roll Forward]
Granted (in shares)	0	1,844,300
Weighted average exercise price [Roll Forward]
Granted (in dollars per share)		$ 0.56
Stock option fair value assumptions [Abstract]
Granted (in shares)	0	1,844,300
Options exercise price (in dollars per share)		$ 0.56
Value of granted options		$ 916,225

Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The amount of cashless exercise of options in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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